William f



fand State of Ohio, have invented certain new and useful Improvements in Bolting- Ghests for Flourin'glMills, of which the follow-ing is a section through a 4bolting-chest embracing my form size it has', under certain conditions of inconveniences.

:UNITED :STATES PATENT OFFICE.

WILLIAM F. oocHaANiaoF 'srninerinnn omo, Assienoa To HiMsnLr -.annWannen annum, on SAME PLAGE..

lMPRVEMENT yIN BoLTiNG FLouR.

Specitieationforming part'of Let'ters Patent No. 37,319, dated January', 1863.

casello.

To' @ZZ whom it may con-cern: l

RANE, of Springfield, in the county ot' Clarke full,.clear,' and exact description, reference be-4 ing had to the accompanying'drawings, which 'make part ot' this specificai ion, and in which#- Figure 1 represents a vertical longitudinal improvements; and Fig. 2, a vertical section at the line w a: of Fig.A 1. l i

' It is found by experiment that 'the process ofv boltin g flour is much facilitated by the use o'fa current vof 'air to force the our through the meshes of the bolting-cloths, but this process requires an almost entire remodeling of the machinery heretofore employed for this purpose. Y Y I have ascertained that when the meal is fed' to the bolting-reel by a spout or trough of unithrough the feedfspout and -pump,idetached,

atmosphere, a tendency to clog or pack.

It is the object ofl one branch of my invention to obviate this objection, and to this end my improvement consists, first, in making the spouts which feed the meal in the shape )f a frustum of a'cone or pyramid, with its smallest end upward, whereby the tendency of the iiour 1o pack in the spout is obviated. Where atmospheric pressure is employed to assist the bolting process it becomes necessary to devise some means whereby the meal may be fed to the baiting-,reel without permitting the air to escape through the feeding-spout, as such escape would be attended with many Anotherbranch of my improvement, therefore, relates to certain devices to attain these ends, and `my improvements for effecting this purpose consist, secondly, in feeding the meal in a bolting-reel where atmospheric pressure is, employed by means of a pump to4 prevent the air i rom escaping up the feedpipe, as such escape would prevent the properfeeding of thereel mthirdly, in making the plunger of the v pump to consist of a series of steps orl offsets hollowed out or Iconcave on their front sides Be it knownthatI, WrLLrAM F. Coon-1 to out out the under portion of the meal, and thus to obviate its tendency to p'ack; fourthly, in a deyice for varying the quantity of i meal fed to the bolt, `vvhereby I am enabled to prevent, the reel from choking; fif th] y, in combining a aringfeeding-spout with a pump to feed the flourto the reel in the most perfect manner.

-of three reels, arranged one labove the other.

In this instance the meal is shown as fed from the coolingoor to the reel by means of a trough pump consists-'of a reciprocating plunger, d,-

playing horizontally in a trough, d', passing through the head of the bolti'ngreel.

In order to break de wn 'the meal more ef,- fectually I forma series of, offsets or' steps, 1Y 2, in the face of the plunger, as shown in Fig. 1 of the drawings. The plunger in this instance is formed of Wood, andhas a rod, d3, screwed into its-:hinder end. lThis rod may pass through a block, d5, inline with the path of the plunger, and a'ct as a guide to it, inwhich case the pitman may loel attached directl y to the plunger itself. Abetter way, however, is to form a circular groove in the rod d3 and connect the pitman to a collar, d, surrounding the rod, by a set-screw passingvv through the collar and into the groove.

To vary the depth to which th'eplunger enters the pump-barrel, and consequently the amount of feed, I loosen the set-screw suf ficiently to permit the `guide-.rod to turnfreely and screw it into or out of the plunger, and

then tighten the, screw again. s By means of the pump the reel is regularly supplied Awith meal, but the escape` of thedetail the construction und operation of the other parts of the mechanism, as they for-n1 no part of the subject-matter herein claimed, sind are, moreover, fully described in sundry other applications for Letters .Patentled simultaneously with this and marked, respectively, AW

, 66 B," and (L DI?) What I clim underl this patent as my invention is l. Feeding the'inecl to the boltingreel by I means of c pump, for the purpose set forth.

2. Making steps or o'sets l 2 upon the plunger of the pump, for' the purpose described.

2. The combination of the plunger d and screw-rod d3., substantially in the manner described, for 'the' purpose of regulating the A amount of feed to the reel.

d. The combination of a flaringl feedingspout with a pump, substantially. in the man ner described, for the purpose set forth.

ln testimony whereof I have hereunto subscribed niy name.

WILLIAM F. COGHRANE.

Witnesses I S. A. BoNINAN, WARDER GUMMING. 

